One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,5)(6,8)(9,10,12,14)(11,13,15,16)(17,18,25,32)(19,33,35,48)(20,28,38,45)(21,27,39,44)(22,30,36,47)(23,29,41,43)(24,42,40,31)(26,37,46,34)(2,5)(6,7)(9,11)(10,13)(12,15)(14,16)(17,19,23,20,24,21,36,37,25,35,41,38,40,39,22,34)(18,26,30,44,31,45,43,48,32,46,47,27,42,28,29,33)(11,15)(13,16)(17,20,36,35,40,34,23,21,25,38,22,19,24,37,41,39)(18,27,43,26,42,48,30,28,32,44,29,46,31,33,47,45)(1,3,4,8)(2,6,5,7)(17,21,23,37,24,35,36,38,25,39,41,34,40,19,22,20)(18,28,30,33,31,26,43,44,32,45,47,48,42,46,29,27)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.